Nickel complexes luminescent

Demas et al.228 1 observed luminescence quenching of [Ru(bpy)2(CN)2] by aciuo lons of cobalt(II), nickel(II), and copper(II) as well as by a number of other complexes. However, Kinnaird and Whitten232) observed blue shifts in both absorbance and emission and substantial emission enhancement in a silver(I) adduct, [Ru(bpy)2(CN)(CNAg)]+,... 

Trioctylphosphine oxide (TOPO) caps are used in quantum dots for LEDs moreover, the CdSe cores of these quantum dots can be obtained directly from cadmium selenide complexes as (12.401) [18,19]. Both TOPO and TOP can be used to produce various nanocrystals [20,21], Quantum dots of InP and GeP are being explored [22,23], Nickel nanoparticles, stabilised by TOPO, have been converted to Ni2P nanoparticles by the action of white phosphorus [21]. Highly luminescent nanocrystals of InP have been obtained. 

The idea of metal-metal bond establishment in the excited state of this complex has also stimulated the interest on the photophysical and photochemical investigations of related d -d complexes. In 1970, Dori and co-workers first reported the luminescence properties of phosphine complexes of d metal centers such as copper(I), silver(I), gold(I), nickel(0), palladium(0), and platinum(0) [12]. Later in 1985, Caspar reported the luminescence properties of polynuclear nickel(O), palladium(O), and platinum(O) complexes of phosphine, phosphite, and arsine [13]. Similar to the related d -d systems, the emissive states of [Pd2(dppm)3] and [Pd Cdpam),] have been suggested to be metal-centered (d-p) in nature modified by metal-metal interaction. 

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